(1) The picture doesn't show any coax connected to the ECB2500C. (2) If you're trying to connect the rest of the house to the "Out" port (i.e. the "TV/STB Out" port), then you should expect MoCA issues, since MoCA signals aren't passed through the "out" RF pass-through port. MoCA signals are only present on the "Coax In" port of the ECB2500C (and any other MoCA adapter with a pass-through port, such as the MM1000, ECB6200). The ECB2500C's "out" coax port, in your case, should be capped with a 75-ohm terminator.